The crankshaft converts the energy generated from the combustion chamber into a rotary motion. Due to the speed ranges required in the engine and the high torques that have to be achieved in comparably small engines today, these components are exposed to high thermal and mechanical stresses. For this reason, crankshafts have a hard surface and a tough core and are usually made of high-alloy heat-treatable steel or special cast grades.

The high surface hardness represents a high challenge to economical grinding processes. EHWA has made this its goal and developed a special bond for the economical grinding of crankshafts.